Company Filing History:

14 out of 234

Western Digital Corporation

where one patent can have more than one assignee

Years Active: 1987-2000

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16 patents (USPTO):Sort by Forward CitationsExplore Patents

1. 6148363 - Device and method for controlling solid-state memory system (2000-11-14),

2. 6081447 - Wear leveling techniques for flash EEPROM systems (2000-06-27),

3. 5806070 - Device and method for controlling solid-state memory system (1998-09-08),

4. 5471478 - Flash EEPROM array data and header file structure (1995-11-28),

5. 5438573 - Flash EEPROM array data and header file structure (1995-08-01),

6. 5430859 - Solid state memory system including plural memory chips and a serialized (1995-07-04),

7. 5278702 - Data synchronizer with symmetric window generation (1994-01-11),

8. 5126692 - Variable frequency system having linear combination of charge pump and (1992-06-30),

9. 4922141 - Phase-locked loop delay line (1990-05-01),

10. 4893030 - Biasing circuit for generating precise currents in an integrated circuit (1990-01-09),

11. 4871979 - Variable frequency system having linear combination of charge pump and (1989-10-03),

12. 4809088 - Integrated system for implementation of read window margining and write (1989-02-28),

13. 4797575 - Flip-flop with identical propagation delay in clock pass through mode (1989-01-10),

14. 4716383 - Precise phase start-up voltage controlled oscillator with accurate duty (1987-12-29),

15. 4704587 - Crystal oscillator circuit for fast reliable start-up (1987-11-03),

Title: Innovations of Karl M Lofgren

Introduction

Karl M Lofgren is a notable inventor based in Newport Beach, CA, with a remarkable portfolio of 16 patents. His work primarily focuses on advancements in solid-state memory systems, contributing significantly to the field of data storage technology.

Latest Patents

One of Lofgren's latest patents is a device and method for controlling solid-state memory systems. This innovative memory system includes an array of solid-state memory devices that communicate with a controller module via a device bus with minimal lines. This design aims to replace traditional mass storage systems, such as disk drives, in computer systems. The system serializes command, address, and data information into component strings, which are multiplexed for efficient transfer. Each memory device is assigned an array address, allowing for selection without the need for dedicated select signals. Additionally, Lofgren has developed wear leveling techniques for flash EEPROM systems. This method manages a mass storage system made of flash memory cells organized into blocks, ensuring even usage across memory banks to extend the service lifetime of the system.

Career Highlights

Throughout his career, Lofgren has worked with prominent companies, including Western Digital Corporation and SanDisk Corporation. His contributions have played a crucial role in the evolution of memory technology, enhancing performance and reliability.

Collaborations

Lofgren has collaborated with notable professionals in the field, including Gerald W Shearer and Robert D Norman. These partnerships have further enriched his innovative endeavors.

Conclusion

Karl M Lofgren's contributions to solid-state memory systems and his extensive patent portfolio highlight his significant impact on the technology landscape. His work continues to influence advancements in data storage solutions.

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